Sj. Dossett et al., Steric activation of chelate catalysts: efficient polyketone catalysts based on four-membered palladium(II) diphosphine chelates, CHEM COMMUN, (8), 2001, pp. 699-700
Palladium(ii) complexes of ligands of the type Ar2PCH2-PAr2 and Ar2PN(Me)PA
r2 (Ar = ortho-substituted phenyl group) are very efficient catalysts for c
opolymerisation of CO and C2H4.